Arc lamp



April 20. 1926.

J. H. WAGENHORST ARC LAMP Filed Oct. 6, 9 s Sheets-Sheet 1 April 20 ,1926. 1,581,408

J. H. WAGENHORST ARC LAME Filed Oct. 6 19 5 Sheets-Sheet 2 April 20 1926.

J. H. WAGENHORST ARC LAMP 3 Sheets-Sheet 5 Filed Oct. 6,. 1919 I aw Patented Apr. 20, 19 26.

uurrao STATES JAMES H. WAGENHORST, F JACKSON, MICHIGAN.

are am.

Application filed October a, 1919. SeriaINo. 328,791.

T 0 all whom it may concern:

Be it known that 1, JAMES H. WAGEN-' ing at Jackson, in the county of Jackson and State of Michigan, have invented a certain new and useful Improvement in Are Lamps, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates generally to are lamps and more particularly to those in which a plurality of pairs of carbons are simultaneously controlled by electro-magnetic means.

The object of the present invention, which is a continuation in part of my pending application Serial No. 213,860 filed January 26, 1918, is to' provide a novel form of construction of a combined carbon holder, carbon guide and binding post.

Another object is to provide a novel form of construction by which the upper and lower carbons can be removed from the lamp without removing the globe therefrom.

Another object is to provide means for equalizing the movement of the parts actuatedby the solenoid.

Another object is to provide shock ab sorbing means whereby the upper carbon is prevented from falling with undue force on the lower carbon and also prevents chatter ing, thereby giving more efficient and silent operation of the arc.

Another object is to provide a circuit whereby the candle power of the lamp may be varied for use with blue printing or photography.

Another object is to provide a novel form .of globe supporting means whereby the globe may be quickly removed from the lamp.

With these and other objects in, view, the inventlon consists in the various novel features of construction and combination, all of which will be fully described hereinafter andpoint'ed out in the claims.

In the accompanying drawings, Fig. 1'

a front elevation illustrating my invent1on applied to a lamp having two pairsof carbons; Fig. 2 is a detail view of the sole noid core; Fig. 3 is a section on the line 33 of Fig. 1; Fi 4 is a perspective view of my combined car on holder, carbon guide and binding post; Fig. 5 is a diagram illustrating a suitable electrical circuit for the lamp;

F 6 is a front elevation illustrating a modification of my lamp; Fig? is a diagram illustrating a suitable electric circuit for controlling the candle power of the lamp; and Fig.8 is a detail view of the globe supporting means.

Describing the various parts by reference characters, 1 indicates the vertical supports preferably made of metal rods or tubes which are held in spaced relation by the top and bottom metal straps'2 and 8, respectively. The top strap 2 carries the lamp suspending means 6 and the binding posts 7 and 7 which are mounted in suitable insulating bushings, not shown.

A solenoid 8, held between the vertical supports by means of a bracket 9, has a slid- Pivotally mounted upon the vertical supports 1 are the levers 15 and 16 which are brought together, attheir inner ends, and fastened by a pin 17 passing through the core stem 12 and the levers. A lift rod 18 is pivotally connected to the outer end of each lever and passes downwardly through a guide 19, of a combined carbon holder, guide and binding post 20 and is fastened at its lower end to the clutch member 21. The combined carbon holder, guide and binding post 20 is preferably a casting in the form of a bushing having on one side a pair of arms 19 which are bored to receive apin 22 for holding the lift-rod therebetween, and having on the other side a lug 23 serving as a binding post 24 and a seat for a set screw 25 for clamping the upper carbon in the bushing.

The lever 16 is spread as at 26, Fig. 3, to receive a dash pot 27 which has a piston rod 28' extending downwardly and held in a socket 29 mounted on a circular asbestos plate 30 which is mounted on the arms 31 of a bushing 32. This asbestos plate rests upon the top of the globe and serves to hold the same in place.

The globe is positioned and supported on the underside by the casting 39 which has a bushing 36 provided with the carbon fastening screw 37 and flared at its upper end to form the globe seat 38. The arm 39 and the bushing 40, slidable on the vertical support 1, are preferably formed integral with the bushing 36. The bushing 40 is supported by the coil spring 41 threaded dashpot 27.. When the carbons are in their on the pin 42 extending through the support 1, andthe slot 43 in the upper end of the bushing engages a pin 4 1 and prevents rotation of the casting about the support.

In order to remove the globe, the spring 41 is rotated counter-clock-wise which I lowers the bushing 40 and disengages the pin 44 from the slot 43 thereby allowing the casting 39 to be swung free from the globe. Y

flexible electrical conductor connects the binding post 7 with the binding post on one of the castings 20, and a similar conductor connects the binding post 7*- with one end of the solenoid, while the other end of the solenoid is connected to the othcr casting binding post.

The electrical circuit of the lamp anay be traced by means of the diagram illustrated in Fig. 5, the circuit being completed between the two lower carbons by means of the metal strap 3. 5

The complete circuit as illustrated in Fig. 7 includes the coils 50 and 51 which are of different resistances, and wound on the same core and insulated from each other in any suitable manner. The COll 50 passes acurrent to the arcs which will give a light suitable for blue printing while the coil 51 of less resistance permits a larger flow of current to the arcs and gives a stronger light suitable for photographic printing. A switch 53 is left in the open position for blue printing and closes when it is desired to do photographic printing.

Fig. 6 shows a slightmodification wherein the dashpot 27 is mounted on the underside of the top strap 2 and in alignment with the solenoid. The solenoid stem 12 carries a yoke 50 which is pivotally connected to links 51 and 52 which are pivotally connected to the levers 15 and 16", respectively. The remaining structure of the lamp is similar to that previously described and hence needs no further explanation.

It will be noted that the construction of the lamp is such that both carbon holding members are located outside of the globe surrounding the arc and thus the carbons can be, easily renewed or changed without involving the necessity of removing the globe.

In operation, the current flowing through the solenoid creates a magnetic field which attracts the core 10, thereby pulling downwardly on the stem 12 which in turn causes the outer endsof levers 15 and 16 to raise the lift rod 18 which operates the clutch member 21 to grasp and raise the carbon andproduce the arc. lVhen the arc is tinguished the current is broken and the solenoid core released allowing the upper car ons to fall which is checked by the lowered position, the clutch member 21 is disengaged from the carbon rods by abutting against the asbestos plate and allows them to feed downwardly until they meet the lower carbons and again complete the circuit.

Having thus described my invention, what I claim is:

1.'In an electric arc lamp, the combination with a frame, and upper and lower electrodes, of a solenoid coil supported by the frame, a lever structure supported by the frame, a core for the solenoid coil suspended I from said lever structure, a clutch for the upper electrode, a lifting rod connected with said clutch and connected with the lever structure, said lever structure being operable to compensate for the varying pull of the solenoid and render the lifting of the upper electrode uniform throughout the effective throw of the solenoid core.

2; In an electric arc lamp, the combina tion with a frame, of two pairs of electrodes, one pair consisting of an upper positive and a lower negative electrode and the other pair consisting of a lower positive and an upper negative electrode, an electromagnetic device, an electric circuit including the coil of said electro-magnetic device and the electrodes of the respective pairs in series, a clutch device for each upper electrode, lifting rods connected with the respective clutch devices, and a pair of levers connecting both lifting rods with the movable member of said electro-magnetic device.

In an electric arc lamp, an upper carbon and a lower carbon, said upper carbon being provided with a combined binding post and guide, a rod working through saidguide, a clutch atthe lower end of said rod and electromagnetic means for operating said rod.

4. In an electric arc lamp, an upper carbon and a lower carbon, said upper carbon being provided with a combined binding post and guide, a rod working through said guide, a clutch upon the lower end thereof, a lever pivotally connected to the upper end there therewith. of :1 depending rod and a dashpot connected to said lover, a clutch at the lower end of said rod, a carbon passing through said clutch and a combined binding post and guide upon the upper end of said carbon,

lessees said depending rod working through said guide.

7. In an arc lamp, the combination with ,a globe, a solenoid and a lever operatively connected therewith, of a depending rod connected to said lever and carrying carbon clutching means, of a combined carbon guide and carbon holder slidably mounted on said rod, said carbon holder being on the exterior of the globe surrounding the arc.

8. In an arc lamp the combination with a globe, a solenoid and a lever operativeiy connected therewith, of a depending rod connected to said lever, a clutch at the lower end of said rod, a carbompassing through said clutch and through a combined holder binding post and guide, said guide being slidable along said rod, said holder lying exteriorly of a globe surrounding the are.

9. In an arc lamp comprising a plurality of upper and lower carbons, the combination with a frame carrying a support for each of said lowercarbons, plurality of heat insulating plates carried said frame and operable to hold a globe about each pair of said upper and lower carbons, a solenoid carried by said frame and equalizing means interposed between said solenoid and said upper carbons whereby said upper carbons are simultaneously actuated.

10'. In an arc lamp, the combination of upper and lower electrodes, suspendingmeans for the upper electrode, said suspendefl'ing means including a rod, a combined holding and guiding device carried by the upper electrode and through which the rod of the suspending means is guided, and a solenoid, the movable member of which is operatively associated with said suspending means.

11. In an electric arc lamp,'the combination with" a plurality of upper and lower electrodes, electromagnetic means, and clutch means for each upper electrode, of two equalizing lever mechanisms connected respective ly with the respective clutch means, and means operatively connecting said lever mechanisms, the connected lever mechanisms being connected with the movable member of the electromagnetic means, whereby the plu-.

rality of upper electrodes will be separated simultaneously and equally-from the lower electrodes when the clectro-magnetic means are energized. v

12. In an electric arc lamp, the combination with a frame, two pairs of upper and lower electrodes and clutches for the upper electrodes, of a solenoid coil, levers so pivotally attached to the frame as to provide outer and inner arms, rods connecting the outer arms of said levers with the clutches,

and a solenoid core suspended from the inner arms of the two levers,

In an arc lamp, theupper and lower carbons, a solenoid, a lever operatively con-' nected with said solenoid, means for susand "a guide attached to the upper carbon and having an opening through which a member of said suspending means passes.

14. In an arc lamp, a pair-of upper and lower carbons, a pair of oppositely disposed le'vers, a solenoid operatively connected with said levers, and means or suspending, the upper carbons from said levers, and a guide carried by each of said upper carbons andv having openings for the passage of said suspending means.

15. In an arc lamp, the combination with a frame comp-rising a pair of parallel members, of a solenoid supported within said frame, a pair of upper and lower carbons, opposed levers each pivot-ed between its ends with said frame and operatively connected at their inner end portions with the core of said solenoid and suspending means pivotally connectedwith the outer end portions of said levers, and carbon clutches operatively vconnectedto the upper carbons and with said suspending means.

18. The combination with a frame, of a sdlenoid carried thereby, a pair of oppositely -disposed levers each pivoted between its ends with the frame and having their inner end portions operatively connect-ed with the core or" said solenoid, a retarding device also carried by said frame and operatively connected 'with one of said levers, upper and lower said members intermediate the ends of the latter, and carbon suspending means supported also by said upright members and operably connected with the core of the solenbid so that said core will partially'counterbalance the carbon supporting means and the upper carbon.

18. The combination with a pair of uprights,'and the upper and lowercarbons, of globes for surroundingsaid carbons, and means connected to said upright members for supporting said globes, a solenoid arranged between said uprights, a pair of levers connected'to said uprights, the inner ends of said levers being operatively connected with said solenoid, rods depending from the outer ends of said levers provided with clutches at their lower ends, carbon. holders upon the upper carbons and conductors connected to saidcarbon holders and to the solenoid.

19. In an arc lamp, the combination of a frame, lever mechanism pivoted on said frame" and including oppositely extending arms, a solenoid, a solenoid-core connected to 9 s a m of said l e PP and i electrodes connected in an electric circuit with said solenoid, a clutch acting on the upper electrode and an operating rod fixed on the opposite arm of said lever and con- 5 nected with said clutch, said upper electrode being suspended from said lever throughsaid operating rod and removed from frictional contact With all relatively stationary \parts above the clutch. J

20. In an arc lamp, the combination of a frame, lever mechanism pivoted on the frame andincluding oppositely extending arms. :1

solenoid, a core for said solenoid connected to one of said arms, upper and lower electrodes connected in an electric circuit with said solenoid, and means suspending said upper electrode from the opposite arm of said lever mechanism, said upper electrode being maintained in axial alinement with the lower electrode by said suspending means.

In testimony whereof, I hereunto affix my signature.

JAMES H. WAGENHORST. 

